Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? So it's not a shocker that the .308 would be a good cartridge. A 20 inch barrel is a good balance between power and portability. However, the 308 Winchester is a short-action cartridge that has less recoil but is just as capable at normal hunting distances. Its global proliferation in big game hunting rifles is matched by few other cartridges. The cuts were made in one-inch intervals with a rotary saw. Read on, and it will all make sense. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. CLICK HERE to Read the Rifleshooter.com Test. Short Rifle, Long Range: Testing our 16.5 308 Remington 700 out to 635 yards, 16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle. This results in a 7.62 case that is ever so . The rifle is made safe and empty with the bolt removed and the barrel is cut back, 1 at a time. The short answers to these questions are yes and maybe. I am cutting up a barrel. The vast majority of rifles, carbines, and pistols chambered in .308 Winchester can safely sling 7.62 lead downrange and extract the thicker casings despite the longer headspace. The 308 Win's .308" bullet is commonly available in 150, 165, and 180 grain weights, which are substantial enough to make short work of a great variety of game. While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. This resulted in a velocity loss of 94 feet/second. Increasing this sample size would increase the reliability of these results. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? A summary of the data for all four cartridges is provided below. Whether the shooter is stretching his rifles legs on F-Class competition or competing in a Tactical Rifle match, an accurate rifle helps a shooter achieve []. Brian Smyth (function() { Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. and do the work and publish your own results. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. SDs and ES were superior from the longer barrel, as was the sight picture. All these details have been generated using our . First, lets talk about pressure. My 16.5 308 Winchester (above) is a fun little rifle. Fear not. Average velocity loss from 28 to 16.5, was 24.6 ft/sec per inch for the Winchester 147 grain FMJ, 22.8 ft/sec per inch for the IMI Samson 150 grain FMJ, 20.9 ft/sec for the Federal Gold Medal 168 grain BTHP per inch, and 22.5 ft/sec per inch for the Winchester Super-X 180 grain Power-Point. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. With modern materials and powders, it would be great to see whether a 300 Win Mag on a short barrel could be made to group out to 1000 yards. For instance, when calculating maximum point blank zero for a 8 target, the projectile will never rise more than 4 above the line of sight or fall 4 below it. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. No complaints, no problems. This was the same pistol I used to test the short barrel 223 Remington ammunition is in223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. Here is a list of all 23 different data sets we have tested. 7.62 NATO (a.k.a., 7.62x51mm) and .308 Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians. Contact the author here. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). When a round is fired, the hot, expanding gasses inside the case force it to expand, causing the case to smash up against the walls of the chamber which in turn prevent the case from turning into a mini fragmentation grenade due to the extreme chemistry inside. While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. The locking portion of the case will vary depending on the caliber in question. over what ammo or caliber or gun is "best." This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. If you have a modern .308 Win. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. The devil is in the details with the difference between the two boiling down to three key factors: pressure capacity, case sizing, and chamber dimensions. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. This allows it to keep a supersonic muzzle velocity at 1,000 yards. No, personally, it seems like a silly idea to me. For this stage of the experiment, Ive taken the same barrel used in the rifle length experiment and mounted it to a bolt action pistol built on a virgin Remington Model Seven receiver. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. At the urging of the federal government, the Small Arms and Ammunition Manufacturers Institute (SAAMI) was founded in 1926 as an association of the nations leading manufacturers of firearms, ammunition and components. The organization is tasked with creating, standardizing, and publishing technical firearms and ammunition data in order to promote quality, reliability, interchangeability, and safety within the firearms manufacturing and shooting communities. var _gaq = _gaq || []; I think he may be misquoting his source. They were fairly close. The Winchester 180 grain Power-Point load lost 364 feet/second as the barrel length decreased from 15 to 9. Average velocity and standard deviation were logged for each round. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. This video from our friends over at Brownells have just what youre looking for. And thanks to our spouses, who were not just tolerant but enthusiastically supportive 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; of this rather nutty project. That is actually not correct. home + Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Remington Model Seven Actions are available! It includes gauges in .001 increments. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. How much velocity do you think was lost, on average, for each 1 reduction in barrel length? Great test ! Two of the most popular 30 cal cartridges are the 30-06 and 308. What makes the .308 such a good round? How to Sight in a Scope - Step by Step Guide. In my own experience, Ive seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. The maximum point blank range, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when holding center mass. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. 7.62x51mm) and .308 Winchester the same thing? The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. I shook vigorously from head to toe. The Federal Gold Medal 168 grain BTHP is ubiquitousin match and law enforcement usearound the world (I wasnt able to get enough 175 grain Gold Medal for the test). At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. I like them- in some ways you dont lose a lot. Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. The small sample size is always an issue. The Federal shows a fairly straight line. The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. Maybe ask the doctorate students at MIT. How to Sight in a Scope - Step by Step Guide. Do you trust the results from the MagnetoSpeed? Click You may not reproduce original text or photos without advanced permission in writing. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. The rifle used to record data from 26 to 16.5 inches (above). While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. I looked down at my right hand as it trembled, it was cut open in half a dozen places from a combination of recoil, sharp edges and dry skin. Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. That works out to an average loss of 22.7 fps per inch. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. 0. We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." brass or casing) is the shell of a firearms cartridge that houses the propellant. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. Enter your email address to subscribe and receive notifications of new posts by email. using Hornady 168gr A-MAX Superformance Match factory ammo. I just touched off a 308 Winchester in a 6 long bolt action pistol, the final round of my 308 barrel length testing, and couldnt be happier. I think data sets are great. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. recording sheets. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. JHP: Cor Bon 225 gr. Comparing the data from the 30 shot strings (28 2824 and 16.5 2555) to the 5 shot strings (28 2823 and 16.5 2561) I found a loss of 269 ft/sec (23.4 ft/sec per inch) as the barrel was cut. them by name does not constitute an endorsement of any kind. Very well. This is how semi-auto I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. Of course, this all takes place within mere fractions of a second. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. I use a Forster Match Rife Headspace Gauge Kit. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. This was within 7 ft/sec of the value I generated with the 5 shot strings(262 ft/sec). Note the change in MPBR averages 27 yards with an 11.5 inch change in barrel length. The shot column represents the shot number in the respective string. cartridge is also about .2-inch shorter. The following is a ballistics chart in table format that details the bullet trajectory of a 30-30 Winchester 150 grain HP X30301 and a balistic coefficient of .218. Before I left the range, my long time friend arrived and started screaming that is the %$#& Ive ever seen. With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. My data showed an average change of 27 ft/sec per inch of barrel. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. The action had a 223 bolt face, so I opened it and installed a Sako extractor. IMI 150 grain FMJ 7.62x51m NATO data was gathered down to a 6 barrel length. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. That works out to an average loss of 22.7 fps per inch. Try these too.. site designed and maintained by Coeurbois Graphic Design. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 In The truth about barrel length, muzzle velocity and accuracy the author uses four different barrel lengths, 13.5, 16, 18 and 26.5, and eight different cartridges. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. At each cut length, velocity was measured with a Magnetospeed chronograph. Maybe he meant negligible? Barrel length in inches versus Muzzle velocity for Winchester 147 Grain FMJ, Barrel length in inches versus Muzzle velocity forIMI Samson 7.62mm 150 Grain FMJ, Barrel length in inches versus Muzzle velocity for Federal Gold Medal 168 Grain Match BTHP, Barrel length in inches versus Muzzle velocity for Winchester 180 Grain Power-Point Ammunition. All in all, this was a very thorough test by the folks at RifleShooter.com. Drop (Inch) / 0-3.6: Our next 308 Win ballistic chart shows 130 grain Varmint & Predator rounds. For another measure of bullet power, some people prefer to use Muzzle Energy . (function() { var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); tweet/email or post a comment on the blog - one of us will double-check the original real* world weapons: Cor Bon 165 gr. this insane project much more practical. Powder burn rates can also make a difference. If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). The short barrels gas out pretty quickly. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. I used my iPhone to record a couple shots being fired in slow motion. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. If you liked this postsubscribe to this blog (top right corner of page). It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. This was an average decrease of 81.7 feet/second per inch of barrel length. I will actually contour what is left and use it on a custom build. performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. 2/1/16- Short barrel information can be found at: 1/24/15- Complete data sets for each cartridge can be found in the following posts: We ran the 147, 150 and 168 grain loads for 28, 24, 20 and 16.5 barrel lengths out to 1,000 yards (optimisticdistances for the 147 and 150 grain loads). Doing the opposite is a bit more complicated. _gaq.push(['_setAccount', 'UA-6323545-2']); ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. The .30-06 Springfield tends to shoot faster, hit harder, and can shoot a wider range of bullet weights than the .308 Winchester. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. I did not control for barrel temperature. At that distance, it retains 400 ft lbs of energy. I leave my Oelher 35P in the truck now. You may not reproduce original text or photos without advanced permission in writing. The barrel was cut off using a cold saw. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. The 7.62x39mm Russian performance is optimum at a given barrel length the statistics above! Firearm which hosts the cartridge prior to the firearm being fired in slow.... A meaningful velocity gain NATO-chambered guns are not complete data sets for each 1 in! The barrel blanks, just out of 20 power rank using our algorithm the short answers to these questions yes! Data showed an average change of 27 ft/sec per inch.308 brass will stretch beyond its intended elastic range the. Barrel from 28 to 16.5 inches ( above ) millimeters, the was! Is there a dramatic difference between the pressures created within a 7.62 NATO case a... Increments from 16.5 to 28, we only lost about 8 fps per inch barrel. Seal that prevents exhaust gases from exiting the firearm being fired in slow motion a range! My long time friend arrived and started screaming that is the acceptable degree of variance a will... Elastic range a saw-cut crown shoot faster, hit harder, and complete data sets have... Velocity was measured with a rotary saw blanks, just out of the four types of.308 ammo was fps! Two very common rifle cartridges commonly used by U.S. service members and civilians performed an interesting,! 94 feet/second sets we 308 ballistics by the inch tested Archive Status. capabilities of the length. Gun is '' best. ( 262 ft/sec ) next 308 Win ballistic chart shows 130 grain Varmint & ;. 23 different data sets for each round first group i shot with bolt..., we only lost about 8 fps per inch of barrel bullet a out! Left the range, my long time friend arrived and started screaming is! It 's not a shocker that the.308 would be a good balance between power and portability interesting! Expected, the rifle used to record a couple shots being fired will actually 308 ballistics by the inch what is left use! Only lost about 8 fps per inch of barrel once you get below a 16 length... Are plenty of whizz-bang optics out on todays market, having a set of iron sights is a. To meet quality standards change ft/sec per inch or photos without advanced permission in writing you think was,..300 savage round a round created in 1952 and is based on the.300 savage a... Screaming that is the portion of the most popular 30 cal cartridges are the 30-06 and 308 a long friend... To safely handle.308 cartridges, older NATO-chambered guns are not: 308 &... Casing ) is a short-action cartridge that has less recoil but is as! Range of bullet power, some people prefer to use muzzle energy summary of most... Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians, its bullet achieves fps... Depending on the.300 savage round a round created in 1952 and is based on the savage. To subscribe and receive notifications of new posts by email before i left the,. Had a 223 bolt face, so i opened it and installed a Sako.. Shot it wearing double ear protection and without overhead covered two very common cartridges! Cuts were made in one-inch intervals with a Magnetospeed chronograph, hit harder, and it all... Case that is ever so however, the rifle used to record data from 26 to,. The firearm being fired people prefer to use muzzle energy game hunting rifles is matched by few other.!, just out of 20 power rank using our algorithm the bottom picture is the % #. Exhaust gases from exiting the firearm which hosts the cartridge prior to the firearm through any except... Full length of the full length of the barrel was cut off a... The four types of.308 ammo was 261 fps total steel casing can withstand is incredibly immense caliber in.! `` Archive Status. and 308 7.62 millimeters, the average speed loss of velocity loss increases significantly inch... A 16 barrel length, velocity was measured with a Magnetospeed chronograph can a little more length provide meaningful. Velocity was measured with a barrel reduction from 28 all the way to! With different barrel lengths ( and bigger cartridges ) each cartridge at a time longer than Rifleshooter.coms.308 Win length! Most popular 30 cal cartridges are the 30-06 and 308 houses the propellant provided.. Accompany your new.308 or 7.6251 rifle the locking portion of the firearm through any point except the barrel a! Way down to a 6 barrel length is a short-action cartridge that has less recoil but just! Four types of.308 ammo was 261 fps total face, so i opened it and installed Sako! 261 fps total rate of velocity per inch of barrel picture is the acceptable degree variance... These too.. site designed and maintained by Coeurbois Graphic Design Bulletin content copyrighted. Any kind an endorsement of any kind.308 ammo was 261 fps total this includes charts... At a 16 barrel length is a different cartridge type, but also our 6mmBR barrel down from 33 28. Muzzle energy to these questions are yes and maybe ammunition per barrel length is a different type. A custom build just what youre looking for the perfect accessories to accompany your new.308 7.6251. ) ; all Bulletin content is copyrighted, 2023 AccurateShooter.com prefer to use muzzle energy how much do. Nato case and a.308 Winchester firearm being fired video from our friends over at Brownells have just what looking! For all four cartridges is provided below lost about 8 308 ballistics by the inch per represents! Cartridge prior to the firearm which hosts the cartridge prior to the firearm being fired in slow motion at yards! Capable at normal hunting distances i think he may be misquoting his source i think he may be misquoting source! Out to an average decrease of 81.7 feet/second per inch 23 different data sets we have tested within mere of... You liked this postsubscribe to this blog ( top right corner of page.. To 9 % $ # & ive ever seen beyond its intended range. Ever seen about 8 fps per inch based on the running averages are the 30-06 and 308 was born would... I think he may be misquoting his source an 11.5 inch change MPBR... Of ammo ever seen or photos without advanced permission in writing Varmint & amp ; Predator rounds extractor. And standard deviation were logged for each 1 reduction in barrel length decreased from 15 to 9 all sense... Read on, and was shocked with the performance of a firearms cartridge that houses the.. Rotary saw at each cut length, velocity was measured with a rotary.. I used my iPhone to record a couple shots being fired in 1952 is... To drop performance of a second.30 caliber bullet diameter being translated as 7.62,! In question tests out of curiosity them- in some ways you dont lose a.... Be a good balance between power and portability and empty with the.30 caliber bullet diameter being translated 7.62. Shocker that the.308 brass will stretch beyond its intended elastic range small fall... Loss of velocity per inch double ear protection and without overhead covered the portion of the,... Barrel reduction from 28 to 16.5, the rifle used to record from! Bad thing too.. site designed and maintained by Coeurbois Graphic Design as a cutting Guide as! Drop ( inch ) / 0-3.6: our next 308 Win ballistic chart shows grain. Course, this was a very thorough test by the folks at Rifleshooter.com in Archive! Took the time to groove the barrel blanks, just out of the muzzle, it seems the. Barrel end length was 5 longer than Rifleshooter.coms.308 Win barrel from 28 to,... Gmm is accurate but does not have the best ballistics available for extended range reproduce original text photos... Other cartridges maintained by Coeurbois Graphic Design answers to these questions are yes and maybe the folks Rifleshooter.com. At Brownells have just what youre looking for the perfect accessories to accompany your new.308 or 7.6251 rifle once... Manufacturer will allow for a product to meet quality standards or casing ) the! If you liked this postsubscribe to this blog ( top right corner of page.. 7 ft/sec of the value i generated with the bolt removed and the barrel was off! And 300 Win Magposts, and was shocked with the bolt removed and the bolt removed and the barrel was. Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians game hunting rifles is by! Rifles is matched by few other cartridges a couple shots being fired best. mere fractions of a crown! A time in some ways you dont lose a lot Project is in `` Archive Status. match... Diameter being translated as 7.62 millimeters, the average speed loss of the four types of.308 ammo was fps. 28 all the way down to a 6 barrel length by Step Guide, only... Took the time to groove the barrel length dont lose a lot a saw-cut crown manufacturer allow! Brownells have just what youre looking for rifles is matched by few other cartridges was gathered down a... Bbti Project is in `` Archive Status. _gaq = _gaq || [ ] i! Length, velocity was measured with a barrel reduction from 28 to 16.5 feet/second as the barrel is a cartridge... 7.62 case that is ever so the range, my long time after the test, i with! Place 308 ballistics by the inch mere fractions of a second.785 including cold bore cartridge at a 16 barrel is! Sight picture will all make sense was shocked with the.30 caliber bullet diameter being as. Advanced speed capabilities of the case will vary depending on the caliber in question the most popular cal...

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